http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55694
Bug #: 55694
Summary: LD error if 0 is added to int variable.
Classification: Unclassified
Product: gcc
Version: 4.8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
AssignedTo: unassig...@gcc.gnu.org
ReportedBy: leo...@volnitsky.com
Not sure if this is a bug. It have same behavior with gcc-4.7.2,
gcc-4.8.0-20121208 and clang-3.2.
I was not able to reproduce this error in minimal example.
Attached two files: ld-error.ii and no-error.ii.
----------------------------------------------
diff *.ii
97125c97125
< out(), is_callable<int(int),int(int)>::value;
---
> out(), 0+is_callable<int(int),int(int)>::value;
----------------------------------------------
So after adding 0 to integer expression there is no error.
This is heavy mataprogramming code.
is_callable - metafunction
comma - is overloaded
out() - some temporary object
Error message:
-----------------------------------------------
g++-4.8.0-pre9999: warning: -pipe ignored because -save-temps specified
main.o: In function `main':
/tmp/scc-lvv-pts1/snippet.cc:2: undefined reference to `sto::is_callable<int
(int), int (int)>::value'
collect2: error: ld returned 1 exit status
-----------------------------------------------
